Malicious PDF — malware analysis report

Static analysis result for SHA-256 28c0866ed2c2ac7d…

MALICIOUS

PDF

46.4 KB Created: 2020-07-24 11:32:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 493e7a2f3885e27da37a202b3e5254ac SHA-1: 4efaa59b39f07cdd0143f755e454563ecef93e2c SHA-256: 28c0866ed2c2ac7df1d5c66310c00b60f0b384bdc42291137db7233be65939fb
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF file contains heuristics indicating it links to known malicious redirector infrastructure and functions as a link farm. The primary malicious URL identified is 'https://ttraff.com/pify?keyword=anatomy+and+physiology+of+heart+video', which is likely used to redirect users to further malicious content. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=anatomy+and+physiology+of+heart+video In PDF document text
    • http://files.jettiethissen.com/uploads/1/3/1/0/131070488/917363.pdfIn PDF document text
    • http://files.hungrywhales.com/uploads/1/3/0/7/130775471/penovasugerok.pdfIn PDF document text
    • http://files.passionartculture.com/uploads/1/3/0/9/130969435/fe7e4144d6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8619/8424/files/nagasip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3862/9270/files/8764702695.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3692/6374/files/81758660474.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4749/2506/files/lenaboxebodo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/15299960646.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/52945462890.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6425/4883/files/nikodemuwivagudezalem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6086/2882/files/37184436112.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1214/5823/files/katepifutesemupoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0008/6180/files/81077498139.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0885/2117/files/28838210810.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2528/5791/files/70324581748.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000078e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78E3 5396 bytes
SHA-256: 3e782cc4a42e92639f4a01cf2276ab4e24216ba07143ef157409332372ce9024
font_01_sfnt_off00008b14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B14 9736 bytes
SHA-256: c541b4f3a071ef5b99b93828adc3b73e24cadec41e8eb5dd47e5207198bd797d

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